CN110789410B - Longitudinal seat adjusting device - Google Patents

Longitudinal seat adjusting device Download PDF

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Publication number
CN110789410B
CN110789410B CN201810870008.1A CN201810870008A CN110789410B CN 110789410 B CN110789410 B CN 110789410B CN 201810870008 A CN201810870008 A CN 201810870008A CN 110789410 B CN110789410 B CN 110789410B
Authority
CN
China
Prior art keywords
adjustment device
rail
upper rail
seat
lower rail
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810870008.1A
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Chinese (zh)
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CN110789410A (en
Inventor
J·弗利克
E·施普伦格
吴培桂
王攀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andotop Usa Co ltd
Keiper Seating Mechanisms Co Ltd
Adient Engineering and IP GmbH
Original Assignee
Adient Yanfeng Seating Mechanisms Co Ltd
Adient Engineering and IP GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Adient Yanfeng Seating Mechanisms Co Ltd, Adient Engineering and IP GmbH filed Critical Adient Yanfeng Seating Mechanisms Co Ltd
Priority to CN201810870008.1A priority Critical patent/CN110789410B/en
Priority to DE102018119648.2A priority patent/DE102018119648A1/en
Priority to EP19188551.6A priority patent/EP3604028B1/en
Priority to US16/530,316 priority patent/US11267370B2/en
Publication of CN110789410A publication Critical patent/CN110789410A/en
Application granted granted Critical
Publication of CN110789410B publication Critical patent/CN110789410B/en
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/07—Slide construction
    • B60N2/0702—Slide construction characterised by its cross-section
    • B60N2/0705—Slide construction characterised by its cross-section omega-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/07—Slide construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/07—Slide construction
    • B60N2/0702—Slide construction characterised by its cross-section
    • B60N2/0715—C or U-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/07—Slide construction
    • B60N2/0722—Constructive details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/08—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable characterised by the locking device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/08—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable characterised by the locking device
    • B60N2/0806—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable characterised by the locking device with pin alignment systems, e.g. with at least one of a plurality of locking pins always aligned w.r.t. at least one of a plurality of pin-receiving elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/08—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable characterised by the locking device
    • B60N2/0812—Location of the latch
    • B60N2/0818—Location of the latch inside the rail
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/08—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable characterised by the locking device
    • B60N2/0831—Movement of the latch
    • B60N2/0862—Movement of the latch sliding
    • B60N2/0875—Movement of the latch sliding in a vertical direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/08—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable characterised by the locking device
    • B60N2/0881—Activation of the latches by the control mechanism
    • B60N2/0887—Activation of the latches by the control mechanism with synchronised movements

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Seats For Vehicles (AREA)

Abstract

The invention relates to a longitudinal seat adjustment device, comprising at least: two rail pairs, which are arranged at a distance from one another and each of which is formed by two rails, namely an upper rail and a lower rail, wherein the upper rail is provided with an opening and the lower rail has a through-opening; and at least one spring-loaded movable locking element which is held on the upper rail, the locking element in the locking position preventing movement of the upper rail in the lower rail and carrying on its two opposite longitudinal sides toothed projections which can be moved from the release position into the locking position, i.e. into the opening and the through-going bore, wherein the locking element fixes the upper rail and the lower rail in the locking position, wherein the opening and/or the through-going bore has a contact region for the toothed projections of the locking element and at least some of the toothed projections have undercuts on both flanks, wherein a projecting edge produced by the undercuts in the locking position is opposite to and/or touches the contact region at the respective flank.

Description

Longitudinal seat adjusting device
Technical Field
The invention relates to a longitudinal seat adjustment device for a vehicle seat.
Background
Seat longitudinal adjustment devices for adjusting a vehicle seat in the longitudinal direction of the vehicle are well known. For example, a longitudinal seat adjustment device is known from DE 10050957 a1, in which the locking element is tiltable and/or rotatable and is secured in its locking position without play by being angularly movable relative to the upper and lower rails.
Disclosure of Invention
The object of the invention is to provide a longitudinal seat adjustment device which is locked in a locking position largely without play and, where appropriate, reliably under possible mechanical stress.
According to the invention, this object is achieved by a longitudinal seat adjustment device having the features of independent claim 1.
Advantageous developments of the invention are the subject matter of the dependent claims.
The longitudinal seat adjustment device according to the invention, in particular for a vehicle seat, comprises:
at least two rail pairs arranged at a distance from one another, each of which is formed by two rails, namely an upper rail and a lower rail, wherein the upper rail is provided with an opening, in particular slot-shaped, and the lower rail has a through-opening, in particular toothed; and
at least one spring-loaded, movable plate-like locking element which is movably held on the upper rail, which locking element prevents the movement of the upper rail in the lower rail in a locking position, and which locking element carries on its two opposite longitudinal sides toothed projections which can be moved by a spring from a release position into the locking position, i.e. into the openings and the through-going holes,
wherein the locking element fixes the upper and lower rail in the locking position, wherein the openings and/or the through-going holes have at least one contact area for the toothed projections of the locking element and at least some of the toothed projections have undercuts on both flanks, wherein the projecting edge produced by the undercut in the locking position at the respective flank of the toothed projections having the undercut lies opposite and/or touches the contact area in the opening and/or the through-going hole. The locking element thus secures the upper and lower rails in the locking position largely without play.
One improvement proposes: when the upper and/or lower rail is moved vertically into the unlocked position due to mechanical stress (e.g. in the event of an accident), the edge and the contact region are configured such that the edge deforms and/or penetrates the contact region. Thereby ensuring that: the locking element locks the upper and lower rails to each other reliably even under mechanical stress. Conventional locks with conventional toothed projections without undercuts may slide out of this locked position under strong mechanical stress and trigger undesired movement between the upper and lower rails. The edge in particular deforms and/or penetrates the contact region in such a way that the upper and lower rails remain in the locked position. The locking disengagement is thereby avoided by means of the edge resulting from the undercut, which under stress intrudes into and deforms the sides of the openings or through-going holes.
In order to support a secure locking even under undesirably strong mechanical stresses, the openings and/or through-holes have inclined or wedge-shaped sides. These openings or through-going holes have for example substantially a V-shape or a U-shape with inclined sides. The lateral distance between the lateral surfaces of the opening or through-hole in the contact region with the projecting edge is narrower than the lateral distance in the region of the undercut. For example, the tooth-like projections have a substantially T-shape in cross section (in longitudinal section with respect to the vehicle). The T-shaped cross-member in this contact region is in contact with the sides of the openings or through-holes and thus in the region of the smaller lateral distance.
In another embodiment, at least the contact areas of the lower rail and/or the upper rail are formed from a material that is softer than the material of the locking element and/or the toothed projection. For example, the lower rail and the upper rail are formed from sheet metal, in particular high-strength sheet metal, in particular sheet metal with a strength >700N/mm2, while the locking element is formed from a solid metal body, in particular a hardened steel body.
One possible embodiment provides that all the tooth-like projections have undercuts at both flanks. This makes it possible to achieve a particularly reliable locking of the upper rail and the lower rail.
On the other hand, it is proposed that the undercut be introduced into the tooth-like projections, for example by means of a forming step. In particular, the undercut can be introduced in the pressing tool by means of a cutting gap or in the blanking tool or embossing tool by means of a punch. The undercut can also be introduced in the cutting press die by means of back-cutting or undercutting or by means of impact (Sto β ens). This can be done by manufacturing the locking element itself in a forming step. Alternatively, the undercut can be introduced into the toothed projections in a separate forming step.
Drawings
Embodiments of the present invention will be explained in more detail with reference to the accompanying drawings. In the drawings:
figure 1 schematically shows an embodiment of a longitudinal adjustment device for a seat in a side view,
figure 2 shows schematically in a perspective view one embodiment of a longitudinal adjustment device with two rail pairs arranged spaced apart from each other,
figures 3A to 3D schematically show different views of one embodiment of a rail pair of the longitudinal adjustment device,
figures 4 to 6 schematically show different cross-sectional views of the guide rail pairs of figures 3C and 3D,
fig. 7 shows schematically in a sectional view a lower rail with projecting edges abutting in the contact area, which projecting edges are produced by undercuts in the toothed projection of the locking element,
fig. 8 shows schematically in a sectional view a through-hole in the lower rail, wherein an edge of one of the tooth-like projections penetrates into the contact region of the through-hole on the side face after being subjected to strong mechanical stress, and
fig. 9 shows schematically in an enlarged sectional view a through-opening in the lower rail, wherein an edge of one of the tooth-like projections penetrates into the contact region of the through-opening on the side face after being subjected to strong mechanical stress (compared to the edge before being subjected to stress).
List of reference numerals
1 seat
2 back support
3 longitudinal seat adjusting device
4 seat part
5 operating element
10 guide rail pair
11 upper guide rail
12 lower guide rail
14 through hole
15 tooth-like projection
15.1, 15.1' undercuts
15.2, 15.2' edge
16 opening
21 locking piece
25 spring
K contact area
Small side distance of F1
Large side distance of F2
In the X longitudinal direction
In the Z vertical direction
Detailed Description
In all the figures, mutually corresponding parts are provided with the same reference numerals.
Fig. 1 schematically shows an embodiment of a seat 1 in a side view, with a backrest 2 and a seat part 4. For adjusting the seat 1 in the longitudinal direction X of the vehicle, the seat 1 comprises a longitudinal adjustment device 3, also referred to as seat longitudinal adjustment device 3. For actuating the longitudinal adjustment device 3, the seat 1 comprises an actuating element 5, for example an actuating handle
Figure BDA0001751899850000041
The operating handle projects forward below the seat 1 for grasping.
Fig. 2 schematically shows an embodiment of the longitudinal adjustment device 3 in a perspective view. The longitudinal adjustment device 3 comprises two rail pairs 10 arranged at a distance from one another, which are each formed by two rails, namely an upper rail 11 and a lower rail 12.
Fig. 3A to 3D schematically show different views of one embodiment of a rail pair 10 of the longitudinal adjustment device 3.
Fig. 3A shows the guide rail pair 10 in a perspective view.
Fig. 3B shows the rail pair 10 in a partial cross-sectional view to show details of the interior of the rail pair 10.
The upper rail 11 is provided with an opening 16, in particular slot-shaped. The lower rail 12 has through-holes 14, which are formed, for example, in the shape of teeth or tooth rings.
At least one spring-loaded, movable locking member 21 is held on the upper rail 11.
In the locking position of the locking element 21, this prevents the movement of the upper rail 11 in the lower rail 12 by means of the toothed projection 15. The toothed projections 15 are arranged on two opposite longitudinal sides of the locking member 21.
The toothed projection 15 can be moved from the release position into the locking position by a spring 25 into the opening 16 and the through-hole 14. For example, the spring 25 is actuated by means of the actuating element 5.
Fig. 3C shows the guide rail pair 10 in a side view, while fig. 3D shows the guide rail pair 10 in a top view of the upper guide rail 11.
Fig. 4 to 6 schematically show different cross-sectional views of the guide rail pair 10 of fig. 3C and 3D.
Fig. 4 shows the cross section of fig. 3C in the region of the locking element 21, which engages with its toothed projection 15 into the opening 16 and the through-opening 14 in the locking position, so that the upper rail 11 and the lower rail 12 are locked to one another against displacement.
Fig. 5 shows the longitudinal section of fig. 3D in the region of the lower rail 12 with the through-holes 14, into which the toothed projections 15 of the locking element 21 engage in the locking position.
Fig. 6 shows the longitudinal section of fig. 3D in the region of the upper rail 11 with, in particular, slot-shaped openings 16, into which the toothed projections 15 of the locking element 21 engage in the locking position.
The opening 16 of the upper rail 11 and/or the through-opening 14 of the lower rail 12 each have at least one contact region K for the toothed projection 15 of the locking element 21.
At least some of the toothed projections 15 have undercuts 15.1 on both flanks, which undercuts are described in more detail below in fig. 7 and 8 by way of example for the guide rail 12.
The projecting edge 15.2 on the respective flank of the projection 15, which is produced by the undercut 15.1, lies opposite and/or touches the contact region K in the locking position.
Fig. 7A to 7C schematically show three sectional views of the same part of the lower rail 12 with a through-hole 14 and a toothed projection 15 engaging into the through-hole in the locked position under different load conditions.
In fig. 7A, the projecting edge 15.2 of the projection 15 touches the contact region K on the side of the through-opening 14. Lower track 12 is shown under normal load conditions.
In fig. 7B the lower rail 12 is slightly bent or swaged in the vertical direction Z in relation to the situation in fig. 7A due to strong mechanical loads, in particular pressed in the direction of the locking element 21 and its protrusion 15. As a result, the projecting edge 15.2 contacts the contact region K on the side of the through-opening 14 to a greater extent and deforms or engages the contact region K therein, as shown in fig. 7C.
Fig. 8 shows schematically in an enlarged sectional view the through-opening 14 in the lower rail 12, wherein the edge 15.2 of the tooth-like projection 15 penetrates into the contact region of the through-opening 14 on the side face after being subjected to strong mechanical stress.
This penetration of the edge 15.2 into the contact region K of the lower rail 12 ensures that the upper rail 11 and the lower rail 12 remain in the locked position. The locking disengagement is thus avoided by means of the edge 15.2 resulting from the undercut 15.1, which under stress penetrates into the side faces of the through-opening 14 and deforms these side faces.
In order to support a secure locking even under undesirably strong mechanical stresses, the opening 16 and/or the through-hole 14 have inclined or wedge-shaped sides. For example, the through hole 14 has a substantially U-shape with inclined sides. Here, the lateral distance F1 between the lateral faces of the through-opening 14 in the contact region K with the projecting edge 15.2 is narrower or smaller than the lateral distance F2 in the region of the undercut 15.1, as shown in fig. 7A.
Furthermore, the tooth-like projection 15 has a substantially T-shape in cross section (in longitudinal section with respect to the vehicle). The T-shaped crosspiece in the contact region K bears against the side of the through-opening 14 and thus in the region of the smaller lateral distance F1.
In another embodiment, at least the contact area K of the lower rail 12 and/or the upper rail 11 is formed from a material that is softer than the material of the locking element 21 and/or the toothed projection 15 of the locking element. For example, lower rail 12 and upper rail 11 are formed from sheet metal, in particular high-strength sheet metal, in particular sheet metal with a strength >700N/mm2, while locking element 21 is formed from a solid metal body, in particular a hardened steel body.
Furthermore, only one of the tooth-like projections 15, or all of the tooth-like projections 15, may have an undercut 15.1 and a projecting edge 15.2 resulting therefrom at both flanks.
Fig. 9 shows schematically in an enlarged sectional view the through-opening 14 in the lower rail 12, wherein the edge 15.2 'and the undercut 15.1' of one of the tooth-like projections 15 penetrate into the contact region of the through-opening 14 on the side face after being subjected to strong mechanical stress (compared to the edge 15.2 and the undercut 15.1 before being subjected to stress).

Claims (12)

1. A longitudinal seat adjustment device (3) comprising at least:
-two rail pairs (10) arranged spaced apart from each other, which are each formed by two rails, namely an upper rail (11) and a lower rail (12), wherein the upper rail (11) is provided with an opening (16, 16') and the lower rail (12) has a through-going hole (14); and
-at least one spring-loaded, movable locking element (21) which is held on the upper rail (11), which in a locking position prevents movement of the upper rail (11) in the lower rail (12), and which carries toothed projections (15) on its two opposite longitudinal sides, which can be moved from a release position into the locking position, i.e. into the openings (16) and the through-going holes (14),
wherein the locking element (21) fixes the upper rail (11) and the lower rail (12) in the locking position, wherein the openings (16) and/or the through-going holes (14) have contact areas (K) for the toothed projections (15) of the locking element (21) and at least some of the toothed projections (15) have undercuts (15.1) on both tooth flanks,
wherein the projecting edge (15.2) produced by the undercut lies opposite and/or touches the contact region (K) at the respective flank in the locking position.
2. The seat longitudinal adjustment device (3) according to claim 1,
wherein the projecting edge (15.2) and the contact area (K) are configured such that the projecting edge (15.2) deforms the contact area (K) when the upper rail (11) and/or the lower rail (12) is moved vertically into an unlocked position due to mechanical stress.
3. The seat longitudinal adjustment device (3) according to claim 1,
wherein the projecting edge (15.2) and the contact region (K) are configured such that the projecting edge (15.2) penetrates into the contact region (K) when the upper rail (11) and/or the lower rail (12) is moved vertically into the unlocking position as a result of mechanical stress.
4. The seat longitudinal adjustment device (3) according to claim 2,
wherein the projecting edge (15.2) deforms the corresponding contact area (K) such that the upper rail (11) and the lower rail (12) remain in the locked position.
5. The seat longitudinal adjustment device (3) according to claim 3,
wherein the protruding edge (15.2) penetrates into the corresponding contact area (K) such that the upper rail (11) and the lower rail (12) are held in the locked position.
6. The seat longitudinal adjustment device (3) according to one of the preceding claims,
wherein the openings (16) and/or the through-openings (14) have inclined sides.
7. The seat longitudinal adjustment device (3) according to one of claims 1 to 5,
wherein at least the contact areas (K) of the lower rail (12) and/or the upper rail (11) are formed from a material which is softer than the material of the locking element (21) and/or the toothed projections (15).
8. The seat longitudinal adjustment device (3) according to one of claims 1 to 5,
wherein all the tooth-like projections (15) have undercuts (15.1) on both flanks.
9. The seat longitudinal adjustment device (3) according to one of claims 1 to 5,
wherein the tooth-like projections (15) have a T-shape in cross section.
10. The seat longitudinal adjustment device (3) according to one of claims 1 to 5,
wherein the undercut (15.1) is guided into the respective tooth-like projection (15) by means of a forming step.
11. The seat longitudinal adjustment device (3) according to claim 10,
wherein the undercut (15.1) is guided into the respective tooth-like projection (15) by means of a cutting gap in a pressing die, or by means of a punch in a punching die or an embossing die, or in a pressure cutting tool, or by means of a hobbing process.
12. The longitudinal seat adjustment device (3) as claimed in claim 1, wherein the longitudinal seat adjustment device is used for a vehicle seat.
CN201810870008.1A 2018-08-02 2018-08-02 Longitudinal seat adjusting device Active CN110789410B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201810870008.1A CN110789410B (en) 2018-08-02 2018-08-02 Longitudinal seat adjusting device
DE102018119648.2A DE102018119648A1 (en) 2018-08-02 2018-08-13 Sitzlängsversteller
EP19188551.6A EP3604028B1 (en) 2018-08-02 2019-07-26 Seat length adjuster
US16/530,316 US11267370B2 (en) 2018-08-02 2019-08-02 Longitudinal seat adjuster

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US20200039390A1 (en) 2020-02-06
EP3604028B1 (en) 2021-06-09
CN110789410A (en) 2020-02-14
DE102018119648A1 (en) 2020-02-06
EP3604028A1 (en) 2020-02-05
US11267370B2 (en) 2022-03-08

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